Ryan K. Onishi, OD
- Medicare patients, 2024
- 188
- Part D claims, 2024
- 15
- Industry payments
- $359
- Affiliated sites
- 2
- Medical group
- 1
- Practice address
- 31401 Rancho Viejo Rd, San Juan Capistrano, CA 92675-1851
- Practice phone
- Call (949) 496-0552
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Optometric Center
Physician office · San Juan Capistrano, California
Find Ryan Onishi's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Ryan K. Onishi is an optometrist in San Juan Capistrano, California
Ryan Onishi practices at Mission Optometric Center in San Juan Capistrano, California.
Ryan Onishi's NPI, 1053487116, was assigned on November 28, 2006. Ryan Onishi graduated from Southern California College of Optometry in 2000. Ryan Onishi holds California license 11380T.
- NPI
- 1053487116NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800846593
- NPI enumeration date
- November 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 496-0552
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Ryan K. Onishi practices at Mission Optometric Center in San Juan Capistrano, California
Ryan Onishi's primary practice is Mission Optometric Center, at 31401 Rancho Viejo Rd, San Juan Capistrano, CA 92675-1851. The practice phone is (949) 496-0552.
- Mission Optometric Center31401 Rancho Viejo Rd, San Juan Capistrano, CA 92675-1851Phone(949) 496-0552
Source: Dmand AI Affiliation Data
Ryan K. Onishi is affiliated with 2 sites of care and 1 medical group
Ryan Onishi's primary practice is Mission Optometric Center in San Juan Capistrano, California. Dmand AI also links Ryan Onishi to 1 group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Ryan K. Onishi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Ryan Onishi practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mission Optometric Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Ryan K. Onishi is one of 7,206 optometrists in California
Optometrist is Ryan Onishi's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Ryan Onishi is licensed in California.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
Optometrists near Ryan Onishi
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Ryan K. Onishi treated 188 Medicare patients in 2024, average age 75
CMS counts 188 Medicare patients who saw Ryan Onishi in 2024. The largest group is 65 to 74, with 95 patients. 75% of them have high cholesterol, and 64% have high blood pressure. Their average risk score is 0.99, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Ryan Onishi's median patient age at 73, with 62% women.
Ryan Onishi's Medicare patients by age, 2024
Ryan Onishi's Medicare patients by sex, 2024
- Women11260%
- Men7640%
Chronic conditions among Ryan Onishi's Medicare patients, 2024
- High cholesterol75%
- High blood pressure64%
- Arthritis42%
- Cancer21%
- Chronic kidney disease20%
- Diabetes20%
- Osteoporosis20%
- Ischemic heart disease18%
Share of Medicare patients with each condition. A patient can have several.
Ryan Onishi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Ryan K. Onishi wrote 15 Medicare Part D claims in 2024
In 2024, Ryan Onishi wrote 15 Medicare Part D claims for 13 patients. 87% of them were for generic drugs.
Ryan Onishi's Part D claims by kind of drug, 2024
- Generic13 claims87%
- Brand-name and other2 claims13%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Ryan K. Onishi takes part in Medicare
Ryan Onishi accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Ryan K. Onishi received $359 in industry payments in 2025
CMS Open Payments shows 9 general payments to Ryan Onishi from 4 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Johnson & Johnson Vision Care, Inc. paid the most, $174.
Companies that paid Ryan Onishi the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Ryan K. Onishi graduated from Southern California College of Optometry
Ryan Onishi graduated from Southern California College of Optometry in 2000.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Ryan K. Onishi's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Ryan K. Onishi
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Ryan K. Onishi's NPI number?
Ryan K. Onishi's NPI number is 1053487116. It was assigned on November 28, 2006, and it is active in the NPI Registry.
What does Ryan K. Onishi specialize in?
Ryan K. Onishi is an optometrist in San Juan Capistrano, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Ryan K. Onishi practice?
Ryan Onishi practices at 31401 Rancho Viejo Rd, San Juan Capistrano, CA 92675-1851. Ryan Onishi's primary practice is Mission Optometric Center in San Juan Capistrano, California. Dmand AI also links Ryan Onishi to 1 group practice or clinic and 1 medical group.
What is Ryan K. Onishi's office phone number?
The practice phone on file for Ryan Onishi is (949) 496-0552.
What is Ryan K. Onishi's medical license number?
Ryan Onishi holds California license 11380T.
Does Ryan K. Onishi accept Medicare?
Yes. CMS lists Ryan Onishi as accepting Medicare assignment.
How many Medicare patients does Ryan K. Onishi see?
CMS counts 188 Medicare patients who saw Ryan Onishi in 2024, with an average age of 75.
Where did Ryan K. Onishi go to medical school?
Ryan Onishi graduated from Southern California College of Optometry in 2000.
Has Ryan K. Onishi received payments from drug or device companies?
CMS Open Payments shows $359 in general payments to Ryan Onishi from 4 companies from 2025 to 2025. The largest total came from Johnson & Johnson Vision Care, Inc.
How long has Ryan K. Onishi been practicing?
Ryan Onishi graduated from medical school in 2000, 26 years ago.
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